Finding the Third Proportional to 139,450 and 213,363

Step by Step Solution

1. Step 1: Write the proportion equation
   139,450 : 213,363 = 213,363 : x
2. Step 2: Convert to fraction form
   139,450/213,363 = 213,363/x
3. Step 3: Cross multiply
   139,450x = 213,363 × 213,363
4. Step 4: Simplify right side
   139,450x = 45,523,769,769
5. Step 5: Solve for x
   x = 45,523,769,769/139,450
6. Step 6: Final answer
   x = 326,452.28